`font-variant-alternates: historical-forms` doesn't reflect properly via StylePropertyMap. Even though `historical-forms` is a supported keyword for this CSS property , we wouldn't get a CSSKeywordValue when reading the property value back. The issue is that we convert to a FontVariantAlternates internally and then back to a CSSValue. The function to convert back to a CSSValue (fontVariantAlternatesPropertyValue) was only handling the `normal` keyword but not the `historical-forms` one.
Pull request: https://github.com/WebKit/WebKit/pull/7640
Committed 257955@main (37f48652e37e): <https://commits.webkit.org/257955@main>
Reviewed commits have been landed. Closing PR #7640 and removing active labels.